Could it be for selfish reasons perhaps?

The straightest path to happiness is devoting ourselves to the happiness of others.

If you give yourself to the hungry and satisfy the desire of the afflicted, then your light will rise in darkness and your gloom will become like midday. And the LORD will continually guide you, and satisfy your desire in scorched places, and give strength to your bones; and you will be like a watered garden, and like a spring of water whose waters do not fail.   ISAIAH 58: 10-11, NASB

Alcorn, Randy. Happiness (p. 291). Tyndale House Publishers, Inc.. Kindle Edition.